Photonic defect states in chains of coupled microresonators - art. no. 155313

Defects in one-dimensional photonic crystals have been studied by angle-res olved photoluminescence spectroscopy from which we obtain a comprehensive p icture of the energies and field distributions of modes in the photon band gaps. The structures have been fabricated by coupling semiconductor microca vities that exhibit an index confinement of light in all three directions t o linear chains. The defects are obtained by varying the size of one of the microcavities in the chain. Time-resolved spectroscopy demonstrates that t he decay rate of the spontaneous emission of quantum dots into a defect mod e is considerably enhanced (Purcell effect).